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Study at TCU

Reseacher

Name MATSUURA Haruaki
Official Title Associate Professor
Affiliation Nuclear Fuel Cycle Engineering, Radiation Application
E-mail hmatuura@tcu.ac.jp
Web
  1. http://www.risys.gl.tcu.ac.jp/Main.php?action=profile&type=detail&tchCd=5001964
Profile My speciality is separation chemistry related to treatment of radwastes. Since there are various kinds of radwastes generated by the development of reprocessing of spent nuclear fuel, we should prepare several options of technique depending on the contaminated level and host materials. The key techinology requirs redution of secondary waste, e.g. extraction chromatography and high temperature electrolysis. My approach in research is combination of not only development of separation technique (macroscopic) but also elucidation of separation mechanism (microscopic). For these aiming, multiprobe techiniques have been utilised in the Atomic Energy Research Laboratory and Synchrotron Radiation Facilities. Afer F1 accident, I have also focused on the treatment of fuel debris and decontamination of ground soil.
Research Field(Keyword & Summary)
  1. (1) Development of simpler treatment process for radwastes Three types of radwastes generated by the basic process developments are targetted. One is salt wastes generated by development of pyrochemical treatment. We choose precipitation and distillation technique. Second is zirconium enriched solution generated by the treatment of fuel debris. We have tested zeolite adsorption. Third is analytical solution containing ammonium nitrates. We choose distillation technique.

    (1) Development of simpler treatment process for radwastes Three types of radwastes generated by the basic process developments are targetted. One is salt wastes generated by development of pyrochemical treatment. We choose precipitation and distillation technique. Second is zirconium enriched solution generated by the treatment of fuel debris. We have tested zeolite adsorption. Third is analytical solution containing ammonium nitrates. We choose distillation technique.

  2. (2) Structural analysis for radwastes volumetric reduction process Various extractants embedded silica matrix for separation between minor actinides and rare earths have been investigated. The aim of this study is reduction of environmental burden in vitrification glass. Stabilization of glass matrix has also evaluated, e.g. molybdenum enriched phase, iron phosphate glasses, and fine alloy of noble metals. Multiprobe analysis has been applied for this purpose.

    (2) Structural analysis for radwastes volumetric reduction process Various extractants embedded silica matrix for separation between minor actinides and rare earths have been investigated. The aim of this study is reduction of environmental burden in vitrification glass. Stabilization of glass matrix has also evaluated, e.g. molybdenum enriched phase, iron phosphate glasses, and fine alloy of noble metals. Multiprobe analysis has been applied for this purpose.

  3. (3) Migration of fission products at severe accident For decomissioning of F1, distribution of fission products should be identified. We have focused on cesium migration and elucidated the penetration mechanism into concrete. Recently strontium is also focused additionally. Radioactive cesium in the lake sadiments also has been focused to elucidate the mechanism of adsorption and desorption. Pyrochemical treatement of simulated fuel debris has been under development.

    (3) Migration of fission products at severe accident For decomissioning of F1, distribution of fission products should be identified. We have focused on cesium migration and elucidated the penetration mechanism into concrete. Recently strontium is also focused additionally. Radioactive cesium in the lake sadiments also has been focused to elucidate the mechanism of adsorption and desorption. Pyrochemical treatement of simulated fuel debris has been under development.
Representative Papers
  1. ① Watanabe, S., Sano, Y., Okada, M., Matsuura, H., Hagura, N., Kada, W.,Structural characterization of Eu-HONTA complexes by IBIL and EXAFS analyses (2020) Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 477, pp. 60-65.
  2. ② Bessada, C., Zanghi, D., Salanne, M., Gil-Martin, A., Gibilaro, M., Chamelot, P., Massot, L., Nezu, A., Matsuura, H., Investigation of ionic local structure in molten salt fast reactor LiF-ThF4-UF4 fuel by EXAFS experiments and molecular dynamics simulations (2020) Journal of Molecular Liquids, 307, art. no. 112927.
  3. ③ Watanabe, S., Senzaki, T., Shibata, A., Nomura, K., Takeuchi, M., Nakatani, K., Matsuura, H., Horiuchi, Y., Arai, T.,Improvement in flow-sheet of extraction chromatography for trivalent minor actinides recovery(2019) Journal of Radioanalytical and Nuclear Chemistry, 322 (3), pp. 1273-1277.
  4. ④ Watanabe, S., Ogi, H., Arai, Y., Aihara, H., Takahatake, Y., Shibata, A., Nomura, K., Kamiya, Y., Asanuma, N., Matsuura, H., Kubota, T., Seko, N., Arai, T., Moriguchi, T., STRAD project for systematic treatments of radioactive liquid wastes generated in nuclear facilities (2019) Progress in Nuclear Energy, 117, art. no. 103090.
  5. ⑤ Watanabe, S., Katai, Y., Matsuura, H., Kada, W., Koka, M., Satoh, T., Arai, T.,Ion beam induced luminescence of complexes formed in adsorbent for MA recovery process(2019) Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 450, pp. 61-65.
Award AESJ paper award, Molten salt chemistry young researchers award
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS) https://nrid.nii.ac.jp/en/nrid/1000070262326/
Research Grants/Projects including subsidies, donations, grants, etc. MEXT project with JAEA and two JAEA cooperative research projects
Recruitment of research assistant(s) no
Affiliated academic society (Membership type) (1)CSJ (member),
(2)ECSJ(member)
(3)AESJ(hyougiin)
(4)MSC(kanji)
Education Field (Undergraduate level) radiochemistry, nuclear fuel cycle, backend engineering, radiation experiment
Education Field (Graduate level) radiochemistry advanced, fuel cycle engineering advanced, nuclear regulation and medical and biologincal application advanced

Affiliation